Road Sign Math

Randy Weiss puts another constant on the board for Massachusetts! This sign confounded him for a while searching for some mathematical relationship, and then it dawned on him that it contained the somewhat common 22/7 combination.

By far the most common approximation of Pi is done again.
{ { 12 + 9 + 1} \over 7 [...]

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Gerald Thurman brings another mathematically significant roadsign, this one from a rather historic location. This sign is right on the east side of the historic Cornish-Windsor Covered Bridge. It is a stunning covered bridge. There is some little type on the bottom of this sign. Under close scrutiny and with input from experts, [...]

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The 2nd edition rules for Road Sign Math introduced the concept of sign scores. This revolutionary development allowed for an entirely new dimension of gameplay. In the past the game was very one dimensional, simply looking for sign counts for states. Now the complexity and elegance of the sign mattered almost more than the [...]

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We’ve been Farked! Today around noon we received a barage of traffic. Thousands of insanely focused people came looking for a taste of mathematically significant road signs. Unfortunately, far too many people came for the lowly cable modem that connects Road Sign Math to the Internet.
For the last few hours the site has been [...]

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Gerald Thurman brings us this sign from the Mojave National Preserve in California. This sign is in a very remote area, where its mathematical significance is only shared by precious few.

The math here is wonderful, and rewards patient observer. The answer isn’t obvious, and most people would likely miss it, but not Mr. Thurman.
(36 [...]

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Gerald Thurman brings us this very, very blue sign from downtown Phoenix, Arizona.

This sign has to avoid the tautology rule in it’s solution. Technically, any sign that has any number of pairs of numbers, with no extra numbers, can be made to work.
17 + 10 - 17 = 10
This sign is found at the [...]

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Put two up for New Jersey on it’s first showing at Road Sign Math. Jamie Thingelstad found this second sign just down the road from Garden State. You may be tempted to think that Brunswick pool tables came from this region, but alas they are not.

The math on this sign uses a dirty little [...]

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Jamie Thingelstad, the founder of Road Sign Math, finally puts another state on the map with a recent visit to New Jersey. This sign was spotted nearly 8 months ago, but it took a long time to capture the mathematically significant sign.

Simple math here resulting in a prime number!
9 + 2 = 11
This sign is [...]

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Randy Weiss contributes another weight limit sign (see Mass Weight Limit) from the mathematical state of Massachusetts. It’s possible that the sign is actually a weight limit sign for the diners at the Clam Box diner, a great spot if you like greasy fried seafood and onion rings!

Great, simple, and elegant math here.
13 + 17 [...]

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David Slauenwhite brings this mathematically significant road sign near the summit of Bloss Mountain in Pennsylvania. This sign brings a combination of different signs together along with some of Mr. Slauenwhite’s signature “little white signs”. There is a uniqueness to this sign as well since the segment numbers, which are indicated on those white [...]

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